I continued on making the cocking ring and assembled the parts and screwed on the gear. It would not fit in place.
It seems that when I tightened the body in the vise I distorted the body and my measurements were not correct when taken out of the vise. The distance between the gear center lines was too small and the gears just jambed.
After I realized what the problem was I determined what the center line measurement was supposed to be. I measured what the distance actually was and determined what the difference was, .0015.
I made a new cocking ring by offsetting the center hole and using this offset to drill the center hole and machine the grooves. I had to turn the bolt carrier down a little to keep it from rubbing the body.
Several years ago I found a site on my sister's computer, .22calgatlinggun.com, that showed pictures of a gun being made. Instead of following Doug's instructions, they soldered the oscillator bracket to the body first and used the straight edge of the bottom of the bracket for clamping and measuring. This is much more accurate. If you had a cocking ring blank made it would be a good idea to screw it in place before clamping the body in the vise. I have not been able to find this exact site since purchasing my computer. It did not occur to me at the time to write down their information.
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